NAEP Analysis and Scaling- Proportion of Scale Score Variance Accounted for by the Population-Structure Models, by Jurisdiction, Grade 8 Reading Combined National and State Assessment: 2003

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NAEP Analysis and Scaling → Estimation of Population and Student Group Distributions → Examining the Population-Structure Models Used in NAEP → Proportion of Scale Score Variance Accounted for by the Population-Structure Models → Proportion of Scale Score Variance Accounted for by the Population-Structure Models, Grade 8 Reading Combined National and State Assessment, by Jurisdiction: 2003

NAEP Technical DocumentationProportion of scale score variance accounted for by the population-structure models, by jurisdiction, grade 8 reading combined national and state assessment: 2003
Jurisdiction	Number of principal components	Proportion¹ of scale score variance
Jurisdiction	Number of principal components	Reading for literary experience	Reading to gain information	Reading to perform a task
Alabama	235	0.63	0.68	0.72
Alaska	83	0.35	0.39	0.41
Arizona	256	0.67	0.67	0.72
Arkansas	251	0.66	0.65	0.74
California	298	0.62	0.64	0.71
Colorado	253	0.64	0.61	0.71
Connecticut	262	0.63	0.65	0.73
Delaware	219	0.59	0.63	0.69
Florida	254	0.62	0.59	0.74
Georgia	258	0.61	0.61	0.66
Hawaii	278	0.66	0.62	0.73
Idaho	240	0.59	0.64	0.72
Illinois	273	0.56	0.58	0.69
Indiana	240	0.57	0.63	0.68
Iowa	243	0.59	0.57	0.67
Kansas	253	0.58	0.55	0.66
Kentucky	241	0.56	0.59	0.61
Louisiana	244	0.67	0.60	0.68
Maine	241	0.57	0.56	0.67
Maryland	249	0.59	0.61	0.71
Massachusetts	263	0.63	0.64	0.74
Michigan	245	0.57	0.61	0.69
Minnesota	235	0.59	0.63	0.67
Mississippi	234	0.56	0.57	0.64
Missouri	246	0.62	0.55	0.68
Montana	238	0.57	0.61	0.66
Nebraska	247	0.59	0.59	0.67
Nevada	246	0.60	0.64	0.70
New Hampshire	233	0.56	0.63	0.63
New Jersey	260	0.66	0.63	0.75
New Mexico	267	0.62	0.66	0.69
New York	272	0.61	0.67	0.75
North Carolina	259	0.54	0.58	0.63
North Dakota	231	0.63	0.63	0.69
Ohio	246	0.61	0.60	0.70
Oklahoma	266	0.58	0.64	0.66
Oregon	263	0.61	0.57	0.66
Pennsylvania	251	0.64	0.61	0.67
Rhode Island	238	0.63	0.61	0.72
South Carolina	245	0.59	0.60	0.63
South Dakota	227	0.60	0.57	0.66
Tennessee	238	0.56	0.56	0.65
Texas	263	0.58	0.62	0.65
Utah	242	0.62	0.58	0.74
Vermont	226	0.59	0.57	0.66
Virginia	262	0.61	0.61	0.68
Washington	270	0.58	0.61	0.66
West Virginia	230	0.54	0.55	0.61
Wisconsin	249	0.67	0.65	0.73
Wyoming	231	0.56	0.59	0.64
Other jurisdictions
American Samoa	141	0.98	0.87	0.96
District of Columbia	196	0.70	0.71	0.65
DDESS²	171	0.94	0.94	0.97
DoDDS³	199	0.53	0.55	0.54
Virgin Islands	132	0.95	0.81	0.93
¹ (Total Variance – Residual Variance)/Total Variance, where Total Variance consists of both sampling and measurement error variance. ² Department of Defense Domestic Dependent Elementary and Secondary Schools. ³ Department of Defense Dependents Schools (Overseas). SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2003 Reading Assessment.

Last updated 13 February 2009 (GF)

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